Imaging lens set with plastic lens element, imaging lens module and electronic device

ABSTRACT

An imaging lens set includes three plastic lens elements, which are a first lens element, a second lens element and a third lens element, and a light blocking sheet. The first lens element includes a first flat abutting portion and a first conical surface. The second lens element includes a second flat abutting portion, a second conical surface, a fourth flat abutting portion and a fourth conical surface. The third lens element includes a third flat abutting portion and a third conical surface. The first flat abutting portion is abutted with the second flat abutting portion, the first conical surface contacts with the second conical surface, and the third conical surface contacts with the fourth conical surface. The light blocking sheet is abutted with the third flat abutting portion and the fourth flat abutting portion, respectively.

RELATED APPLICATIONS

The present application is a continuation of U.S. application Ser. No.15/861,859, filed Jan. 4, 2018, which claims priority to TaiwanApplication Serial Number 106116147, filed May 16, 2017, which is hereinincorporated by reference.

BACKGROUND Technical Field

The present disclosure relates to an imaging lens set with plastic lenselement and an imaging lens module. More particularly, the presentdisclosure relates to an imaging lens set and an imaging lens modulewhich are applicable to a portable electronic device.

Description of Related Art

Recently, the portable devices, such as smart phone and pad, aredeveloped rapidly and ubiquitous in the human life. The imaging lensdisposed therein is thus becomes growth industry. With the improvementof the technology, more and more demands for high qualities of imaginglens come out. Therefore, in addition to improving the quality ofimaging lens in optical design field, the precision of manufacturing andassembling processes are needed to be improved too.

FIG. 14 is a cross-sectional view of a conventional imaging lens module6000. In FIG. 14, the imaging lens module 6000 includes a plastic barrel6100, an optical lens assembly 6200 and at least one light blockingsheet 6300. The optical lens assembly 6200 includes a lens element 6210,a lens element 6220, a lens element 6230, a lens element 6240 and a lenselement 6250, which are all disposed in the plastic barrel 6100. Thelight blocking sheet 6300 is disposed between the lens element 6230 andthe lens element 6240. As the required pixel is increased, thedifference between an outside diameter of the lens element 6220, anoutside diameter of the lens element 6230 and an outside diameter of thelens element 6240 is gradually increased. In the meanwhile, a requiredthickness of the light blocking sheet 6300 becomes thinner. The lightblocking sheet 6300 only can be clipped between the lens element 6230and the lens element 6240 so that a design for sharing a pressing forcesuffered by the light blocking sheet 6300 is lacked. Thus, the lightblocking sheet 6300 will suffer such the unusual pressing force so as tobe warpage in the assembling process and allow a central opening to bewave-like distortion, that is, deflection. For an increasingly harshphotographic quality, such a small distortion will affect an actualimage capture of the lens module under an intense light source so thatan image quality of an object with high brightness will be lower thanexpected.

Given the above, how to simultaneously meet the requirements ofsuppressing the stray light and accurate alignment with the optical axisof the compact optical lens assembly has become one of the importantsubjects, so that the image quality of the compact optical lensassemblies can be enhanced, and the requirements of high-end opticalsystems with camera functionalities can be satisfied.

SUMMARY

According to one aspect of the present disclosure, an imaging lens setincludes at least three plastic lens elements and at least one lightblocking sheet. The three plastic lens elements include a first lenselement, a second lens element and a third lens element which arearranged along a central axis of the imaging lens set in order from anobject side to an image side. Each of the plastic lens elements and thelight blocking sheet includes an object-side surface and an image-sidesurface disposed relative to the object-side surface. The first lenselement includes a first flat abutting portion and a first conicalsurface, wherein the first flat abutting portion is disposed on theimage-side surface of the first lens element, the first conical surfaceis disposed on the image-side surface of the first lens element, and thefirst conical surface is closer to the central axis than the first flatabutting portion thereto. The second lens element includes a second flatabutting portion, a second conical surface, a fourth flat abuttingportion and a fourth conical surface, wherein the second flat abuttingportion is disposed on the object-side surface of the second lenselement, and the fourth flat abutting portion is disposed on theimage-side surface of the second lens element, and the second conicalsurface is disposed at the object-side surface of the second lenselement, and the second conical surface is closer to the central axisthan the second flat abutting portion thereto. The fourth conicalsurface is disposed on the image-side surface of the second lenselement, and the fourth conical surface is farer away from the centralaxis than the fourth flat abutting portion to the central axis. Thethird lens element includes a third flat abutting portion and a thirdconical surface, wherein the third flat abutting portion is disposed onthe object-side surface of the third lens element, and the third conicalsurface is disposed on the object-side surface of the third lenselement, and the third conical surface is farer away from the centralaxis than the third flat abutting portion to the central axis. The firstflat abutting portion is abutted with the second flat abutting portion,the first conical surface contacts with the second conical surface, andthe third conical surface contacts with the fourth conical surface. Thelight blocking sheet has a central opening and is coaxially arrange withthe plastic lens elements. The light blocking sheet is disposed betweenthe second lens element and the third lens element, and further includesan outer diameter surface. The outer diameter surface connects theobject-side surface and the image-side surface of the light blockingsheet and is coaxial with the central opening, wherein the object-sidesurface of the light blocking sheet is abutted with the fourth flatabutting portion, and the image-side surface of the light blocking sheetis abutted with the third flat abutting portion. When a minimum diameterof the fourth conical surface is ψ4, and a maximum diameter of thesecond conical surface is ψ2, the following condition is satisfied: 0.13mm<(ψ4−ψ2)/2<1.20 mm.

According to another aspect of the present disclosure, an imaging lensmodule includes a plastic barrel and the imaging lens set as mentionedabove. The plastic barrel has a minimum central opening, and the imaginglens set is disposed in the plastic barrel.

According to another aspect of the present disclosure, an electronicdevice includes the abovementioned imaging lens module and an imagesensor. The image sensor is disposed on an image surface of the imaginglens module.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1A is a schematic view of an imaging lens set according to the 1stexample of the present disclosure;

FIG. 1B is an exploded view of the imaging lens set in FIG. 1A;

FIG. 1C is a top view of a light blocking sheet of the imaging lens setin FIG. 1A;

FIG. 1D is a cross-sectional view along line 1 d-1 d of FIG. 1C;

FIG. 2A is a schematic view of an imaging lens set according to the 2ndexample of the present disclosure;

FIG. 2B is an exploded view of the imaging lens set in FIG. 2A;

FIG. 2C is a top view of a light blocking sheet of the imaging lens setin FIG. 2A;

FIG. 2D is a cross-sectional view along line 2 d-2 d of FIG. 2C;

FIG. 3A is a schematic view of an imaging lens set according to the 3rdexample of the present disclosure;

FIG. 3B is an exploded view of the imaging lens set in FIG. 3A;

FIG. 3C is a cross-sectional view of a light blocking sheet of theimaging lens set in FIG. 3A;

FIG. 4A is a schematic view of an imaging lens set according to the 4thexample of the present disclosure;

FIG. 4B is an exploded view of the imaging lens set in FIG. 4A;

FIG. 4C is a cross-sectional view of a light blocking sheet of theimaging lens set in FIG. 4A;

FIG. 5A is a schematic view of an imaging lens set according to the 5thexample of the present disclosure;

FIG. 5B is an exploded view of the imaging lens set in FIG. 5A;

FIG. 5C is a cross-sectional view of a light blocking sheet of theimaging lens set in FIG. 5A;

FIG. 6 is a cross-sectional view of an imaging lens module according tothe 6th example of the present disclosure;

FIG. 7 is a cross-sectional view of an imaging lens module according tothe 7th example of the present disclosure;

FIG. 8 is a cross-sectional view of an imaging lens module according tothe 8th example of the present disclosure;

FIG. 9 is a cross-sectional view of an imaging lens module according tothe 9th example of the present disclosure;

FIG. 10 is a cross-sectional view of an imaging lens module according tothe 10th example of the present disclosure;

FIG. 11A is a schematic view of an electronic device according to the11th example of the present disclosure;

FIG. 11B is another schematic view of the electronic device of the 11thexample;

FIG. 11C is a block diagram of the electronic device of the 11thexample;

FIG. 12 is a schematic view of an electronic device according to the12th example of the present disclosure;

FIG. 13 is a schematic view of an electronic device according to the13th example of the present disclosure; and

FIG. 14 is a cross-sectional view of a conventional imaging lens module.

DETAILED DESCRIPTION

An imaging lens set includes at least three plastic lens elements and atleast one light blocking sheet. Each of the three plastic lens elementsand the light blocking sheet includes an object-side surface and animage-side surface disposed relative to the object-side surface. Thelight blocking sheet has a central opening and is coaxially arrangedwith the three plastic lens elements. Thus, manufacturing costs can beeffectively reduced by using the plastic lens element. Furthermore, thelight blocking sheet is provided for blocking the unwanted light in theimaging lens module.

The three plastic lens elements include a first lens element, a secondlens element and a third lens element which are arranged along a centralaxis of the imaging lens set, in order from an object side to an imageside. Specifically, the first lens element includes a first flatabutting portion and a first conical surface. The first flat abuttingportion is disposed on the image-side surface of the first lens element,and the first conical surface is disposed on the image-side surface ofthe first lens element, and the first conical surface is closer to thecentral axis than the first flat abutting portion thereto. The secondlens element includes a second flat abutting portion, a second conicalsurface, a fourth flat abutting portion and a fourth conical surface.The second flat abutting portion is disposed on the object-side surfaceof the second lens element, and the fourth flat abutting portion isdisposed on the image-side surface of the second lens element. Thesecond conical surface is disposed on the object-side surface of thesecond lens element, and the second conical surface is closer to thecentral axis than the second flat abutting portion thereto. The fourthconical surface is disposed on the image-side surface of the second lenselement, and the fourth conical surface is farer away from the centralaxis than the fourth flat abutting portion to the central axis. Thethird lens element includes a third flat abutting portion and a thirdconical surface. The third flat abutting portion is disposed on theobject-side surface of the third lens element. The third conical surfaceis disposed on the object-side surface of the third lens element, andthe third conical surface is farer away from the central axis than thethird flat abutting portion to the central axis. The light blockingsheet is disposed between the second lens element and the third lenselement and further includes an outer diameter surface. The outerdiameter surface connects the object-side surface and the image-sidesurface of the light blocking sheet and is coaxial with the centralopening.

In particular, the first flat abutting portion can be abutted with thesecond flat abutting portion, the first conical surface can contact withthe second conical surface, and the third conical surface can contactwith the fourth conical surface. Moreover, the object-side surface ofthe light blocking sheet can be abutted with the fourth flat abuttingportion, and the image-side surface of the light blocking sheet can beabutted with the third flat abutting portion. When a minimum diameter ofthe fourth conical surface is ψ4, and a maximum diameter of the secondconical surface is ψ2, the following condition can be satisfied: 0.13mm<(ψ4−ψ2)/2<1.20 mm.

Thus, a first axial connecting structure can be constructed between thefirst lens element and the second lens element by the contact of thefirst conical surface and the second conical surface and the abutment ofthe first flat abutting portion and the second flat abutting portion.Thus, the first lens element and the second lens element can beassembled with each other and aligned to the central axis of the imaginglens set. A second axial connecting structure can be further constructedby the contact of the fourth conical surface and the third conicalsurface and the abutment of the fourth flat abutting portion, the thirdflat abutting portion, the object-side surface and the image-sidesurface of the light blocking sheet. Thus, the second lens element andthe third lens element can be assembled with each other and aligned tothe central axis of the imaging lens set. That is, it is favorable foraligning the lens elements having excessive difference between the outerdiameter thereof by the arrangement of the first axial connectingstructure and the second axial connecting structure so as to improve theaccuracy of the assembling process.

The first conical surface and the second conical surface can beassembled with each other for aligning to the central axis, and thefourth conical surface and the third conical surface are assembled witheach other for aligning to the central axis. Thus, it is easier tocontrol the dimensional accuracy of the conical surface so that theutilization of the conical surface during the assembling process isbeneficial for mass production. When the minimum diameter of the fourthconical surface is ψ4, and the maximum diameter of the second conicalsurface is ψ2, the following condition is further satisfied: 0.18mm<(ψ4−ψ2)/2<0.85 mm. Thus, the location of the conical surface can beclearly defined so that a poor injection is avoided during themanufacture of the plastic lens elements through a plastic moldingprocess. In addition, a diameter of the first conical surface of thefirst lens element in the present disclosure is reduced gradually fromthe image-side surface thereof to the object-side surface thereof, adiameter of each of the second conical surface and the fourth conicalsurface of the second lens element is also reduced gradually from theimage-side surface thereof to the object-side surface thereof, and adiameter of the third conical surface of the third lens element isreduced gradually from the image-side surface thereof to the object-sidesurface thereof. However, the arrangements of the present disclosurewill not be limited thereto.

When a diameter of the outer diameter surface of the light blockingsheet is D, and the minimum diameter of the fourth conical surface isψ4, the following condition is satisfied: |ψ4−D|/2≤0.05 mm. Accordingly,the light blocking sheet will not be over tilt due to the smalldifference between the diameter of the outer diameter surface of thelight blocking sheet and the minimum diameter of the fourth conicalsurface. Thus, the light blocking efficiency will not be affected. Whenthe diameter of the outer diameter surface of the light blocking sheetis D, the minimum diameter of the fourth conical surface is ψ4, and themaximum diameter of the second conical surface is ψ2, the followingcondition is satisfied: 0.6<(π{circumflex over ( )}2)×((ψ4−ψ2)/D)<3.6.Thus, a space for receiving the light blocking sheet can be improved forblocking more stray light from the second conical surface. Preferably,the following condition can be satisfied: 0.82<(π{circumflex over( )}2)×((ψ4−ψ2)/D)<2.9. Thus, a preferably blocking area can beprovided. When a minimum inner diameter of the central opening of thelight blocking sheet is ψi, and the diameter of the outer diametersurface of the light blocking sheet is D, the following condition issatisfied: 0.4<ψi/D<0.76. Thus, the effect of the image quality resultedfrom the light blocking sheet with an oversized central opening and theeffect of lens specifications resulted from the light blocking sheetwith an insufficient-sized central opening can be prevented.

When an angle between the second conical surface and the central axis isα1 and corresponding to an angle between the first conical surface andthe central axis, the following condition is satisfied: 3 degrees<α1<42degrees. When an angle between the fourth conical surface and thecentral axis is α2 and corresponding to an angle between the thirdconical surface and the central axis, the following condition issatisfied: 3 degrees<α2<42 degrees. Thus, the possibility of the massproduction can be greatly enhanced by a proper angle of the conicalsurface. Preferably, the following condition of the angle between thefourth conical surface and the central axis can be further satisfied: 13degrees<α2<33 degrees. Thus, the roundness of single lens element willnot affect the fit of the lens elements by designing the proper angle ofthe conical surface. Similarly, the following condition of the anglebetween the second conical surface and the central axis can be furthersatisfied: 13 degrees<α1<33 degrees.

When an outer diameter of the first lens element is D1, an outerdiameter of the second lens element is D2, and the minimum diameter ofthe fourth conical surface is ψ4, the following condition is satisfied:D1≤ψ4<D2. Thus, the abovementioned imaging lens set can be applied to anoptical design system with a larger aperture stop. When the outerdiameter of the first lens element is D1, and the minimum diameter ofthe fourth conical surface is ψ4, the following condition is satisfied:0.9<ψ4/D1<1.35. Thus, each of the lens elements can be aligned to acenter of the adjacent lens element through the conical surface forreducing the tolerance of the assembling process. In particular, theoutside diameter of the first lens element and the minimum diameter ofthe fourth conical surface can further satisfy the following condition:0.94<ψ4/D1<1.15. Thus it is favorable for reducing the qualitydifference between the imaging lens modules with the same model. Whenmore than two imaging lens modules with the same model are used in onemobile phone, the imaging lens set, which satisfies the condition asmentioned above, can reduce the effect of the quality difference of theimaging lens modules.

When the outer diameter of the second lens element is D2, and a width ofthe fourth conical surface is w4, the following condition is satisfied:0.1<(π{circumflex over ( )}2)×w4/D2<0.45. By a specific design of thefourth conical surface, such as a proper width, a partial thickness ofthe plastic lens element will not be too thick to affect themanufacturing quality so as to maintain the possibility of manufacturingthe plastic lens element through the plastic molding process. Moreover,the width of the fourth conical surface, the minimum diameter of thefourth conical surface and the maximum diameter of the second conicalsurface can further satisfy the following condition:2.2<(ψ4−ψ2)/(2×w4)<6.2. Thus, a sub-injection flow channel, which isnarrow partially, can be formed for dealing with the injection moldingprocess with a too slow injection rate so as to save the cost. Moreparticularly, the width of the fourth conical surface, the minimumdiameter of the fourth conical surface and the maximum diameter of thesecond conical surface can further satisfy the following condition:2.8<(ψ4−ψ2)/(2×w4)<5.4. Thus, the imaging lens set of the presentdisclosure is suitable to be applied in the mass production, which isrequired to be completed within a short period, with harsh productionconditions.

In the present disclosure, the second lens element contacts with thethird lens element only via the fourth conical surface and the thirdconical surface. Thus, it is favorable for avoiding the second lenselement from suffering the unnecessary pressing force so as to beapplied in the imaging lens set, which has the large difference of theoutside diameters. Moreover, a part of the third conical surface is notoverlapped with the second lens element along a direction perpendicularto and away from the central axis. Thus, the roundness of single lenselement will not affect the fit of the lens elements by designing suchthe air gap.

The present disclosure further provides an imaging lens module includingthe abovementioned imaging lens set. The imaging lens set can be engagedwith at least one lens element or an opaque member of the imaging lensmodule through the engaging structure thereof. When the imaging lens setis engaged with the lens element, the central axis thereof can bealigned to an optical axis of the lens element for increasing theoptical accuracy and maintaining high image quality. When the imaginglens set is engaged with the opaque member, the stability of the wholeimaging lens module can be increased, and image quality of the imaginglens module will not be affected due to the collision in the externalenvironment.

In particular, the opaque member can be but not limited to a plasticbarrel of the imaging lens module. The imaging lens set can be disposedin the plastic barrel along the central axis. In particular, the plasticbarrel has a barrel hole. More particularly, a minimum inner diameterposition of the barrel hole can be an aperture stop of the imaging lensmodule. Therefore, it is favorable for simplifying the mechanical designof the imaging lens module.

Furthermore, the imaging lens module can be applied to 3D(three-dimensional) image capturing applications, in products such asdigital cameras, mobile devices, digital tablets, smart TVs,surveillance systems, motion sensing input devices, driving recordingsystems, rearview camera systems, and wearable devices.

Accordingly, an electronic device is further provided in the presentdisclosure for satisfying the requirements for high resolution and imagequality of present compact imaging lens modules. Preferably, theelectronic device can further include but not limited to a display, acontrol unit, a storage unit, a random access memory unit (RAM) or aread-only memory unit (ROM) or a combination thereof.

According to the above description of the present disclosure, thefollowing specific examples are provided for further explanation.

1st Example

FIG. 1A is a schematic view of an imaging lens set 100 according to the1st example of the present disclosure, and FIG. 1B is an exploded viewof the imaging lens set 100 in FIG. 1A. In FIG. 1A, the imaging lens set100 of the 1st example includes three plastic lens elements and a lightblocking sheet, in which the imaging lens set 100 has a central axis z.In particular, the three plastic lens elements include a first lenselement 110, a second lens element 120 and a third lens element 130which are arranged along the central axis z of the imaging lens set 100in order from an object side to an image side. The light blocking sheet140 is disposed between the second lens element 120 and the third lenselement 130. More particularly, the light blocking sheet 140 has acentral opening 144 (its reference numeral is labeled in FIG. 1C) whichis coaxial with the first lens element 110, the second lens element 120and the third lens element 130.

In FIG. 1B, each of the first lens element 110, the second lens element120, the third lens element 130 and the light blocking sheet 140includes an object-side surface and an image-side surface disposedrelative to the object-side surface. In particular, the first lenselement 110 includes the object-side surface 111 and the image-sidesurface 112 disposed relative to the object-side surface 111. The secondlens element 120 includes the object-side surface 121 and the image-sidesurface 122. The third lens element 130 includes the object-side surface131 and the image-side surface 132. The light blocking sheet 140includes the object-side surface 141 and the image-side surface 142.

Each of the object-side surfaces of the plastic lens elements includesan effective optical section and a lens peripheral section which arearranged from the central axis z to the edge thereof. The effectiveoptical section is aspheric, and the imaging light passes through theeffective optical section. The lens peripheral section surrounds theeffective optical portion. Moreover, each of the image-side surfaces ofthe plastic lens elements includes an effective optical section and alens peripheral section which are arranged from the central axis z tothe edge thereof. The effective optical section is aspheric, and theimaging light passes through the effective optical section. The lensperipheral section surrounds the effective optical portion. In details,the object-side surface 111 of the first lens element 110 includes aneffective optical section 111 a and a lens peripheral section 111 bwhich are arranged from the central axis z to the edge thereof, and theimage-side surface 112 of the first lens element 110 includes aneffective optical section 112 a and a lens peripheral section 112 bwhich are arranged from the central axis z to the edge thereof. Theobject-side surface 121 of the second lens element 120 includes aneffective optical section 121 a and a lens peripheral section 121 bwhich arranged from the central axis z to the edge thereof, and theimage-side surface 122 of the second lens element 120 includes aneffective optical section 122 a and a lens peripheral section 122 bwhich are arranged from the central axis z to the edge thereof. Theobject-side surface 131 of the third lens element 130 includes aneffective optical section 131 a and a lens peripheral section 131 bwhich are arranged from the central axis z to the edge thereof, and theimage-side surface 132 of the third lens element 130 includes aneffective optical section 132 a and a lens peripheral section 132 bwhich are arranged from the central axis z to the edge thereof.

The first lens element 110 includes a first flat abutting portion 113and a first conical surface 114, in which the first flat abuttingportion 113 and the first conical surface 114 are both disposed on theimage-side surface 112 of the first lens element 110. In particular, thefirst flat abutting portion 113 and the first conical surface 114 areboth located within the lens peripheral section 112 b of the image-sidesurface 112 of the first lens element 110. The first conical surface 114is formed by extending the first flat abutting portion 113 towards thecentral axis z and bending towards the object-side surface 111. Thus,the first conical surface 114 is closer to the central axis z than thefirst flat abutting portion 113 thereto, but will not limited thereto.

The second lens element 120 includes a second flat abutting portion 123,a second conical surface 124, a fourth flat abutting portion 125 and afourth conical surface 126. In particular, the second flat abuttingportion 123 and the second conical surface 124 are both located at theobject-side surface 121 of the second lens element 120. The secondconical surface 124 is formed by extending the second flat abuttingportion 123 towards the central axis z and bending towards the outsideof the object-side surface 121. Thus, the second conical surface 124 iscloser to the central axis z than the second flat abutting portion 123.Moreover, the fourth flat abutting portion 125 and the fourth conicalsurface 126 are both located at the image-side surface 122 of the secondlens element 120. The fourth conical surface 126 is formed by extendingthe fourth flat abutting portion 125 away from the central axis z andbending towards the outside of the image-side surface 122. Thus, thefourth conical surface 126 is farer away from the central axis z thanthe fourth flat abutting portion 125.

The third lens element 130 includes a third flat abutting portion 133and a third conical surface 134. The third flat abutting portion 133 andthe third conical surface 134 are both disposed on the object-sidesurface 131 of the third lens element 130. The third conical surface 134is formed by extending the third flat abutting portion 133 away from thecentral axis z and bending towards the image-side surface 132. Thus, thethird conical surface 134 is farer away from the central axis z than thethird flat abutting portion 133.

As shown in FIG. 1A, the first flat abutting portion 113 is abutted withthe second flat abutting portion 123, the first conical surface 114contacts with the second conical surface 124, and thus a first axialconnecting structure (its reference numeral is omitted) is constructedbetween the first lens element 110 and the second lens element 120, sothat the first lens element 110 and the second lens element 120 can beassembled with each other and aligned to the central axis z of theimaging lens set 100. Similarly, the fourth conical surface 126 contactswith the third conical surface 134, and the object-side surface 141 ofthe light blocking sheet 140 is abutted with the fourth flat abuttingportion 125, and the image-side surface 142 of the light blocking sheet140 is abutted with the third flat abutting portion 133. Thus, a secondaxial connecting structure (its reference numeral is omitted) isconstructed among the second lens element 120, the light blocking sheet140 and the third lens element 130, so that the second lens element 120and the third lens element 130 can be assembled with each other andaligned to the central axis z of the imaging lens set 100. As shown in apartial enlarged diagram of FIG. 1A, a part of the third conical surface134 is not overlapped with the second lens element 120 along a directionperpendicular to and away from the central axis z. That is, in thesecond axial connecting structure, an air gap is arranged between theedge of the second lens element 120 and the edge of the third lenselement 130 in the direction perpendicular to the central axis z. Thus,the roundness of single lens element will not affect the fit of the lenselements.

In FIG. 1B, an angle α1 between the second conical surface 124 and thecentral axis z is disposed corresponding to an angle between the firstconical surface 114 and the central axis z, that is, α3, for assemblingwith each other. Thus, the roundness of single lens element will notaffect the fit of the lens elements by designing the proper angle of theconical surface so as to increase the possibility of the massproduction. Similarly, an angle α2 between the fourth conical surface126 and the central axis z is disposed corresponding to an angle, thatis, α4, between the third conical surface 134 and the central axis z forassembling with each other.

In addition, the imaging lens set 100 can include other optical elementsdisposed between each two of the first lens element 110, the second lenselement 120 and the third lens element 130 or between the object-sidesurface 111 of the first lens element 110 and the image-side surface 132of the third lens element 130. The optical elements can be but notlimited to lens elements, imaging compensation elements, light blockingsheets, spacers or retainers. The first lens element 110 can bemanufactured by an injection molding process and integrated with thefirst flat abutting portion 113 and the first conical surface 114.Similarly, both the second lens element 120 and the third lens element130 can be manufactured by the injection molding process and have thesame configuration.

FIG. 1C is a top view of a light blocking sheet 140 of the imaging lensset 100 in FIG. 1A, and FIG. 1D is a cross-sectional view along line 1d-1 d of FIG. 1C. In FIG. 1C and FIG. 1D, the light blocking sheet 140has the central axis z. The object-side surface 141 and the image-sidesurface 142 of the light blocking sheet 140 further includes an outerdiameter surface 143 and a central opening 144. The central axis zpasses through the central opening 144. The outer diameter surface 143connects the object-side surface 141 with the image-side surface 142 ofthe light blocking sheet 140 and is coaxial with the central opening144. The central opening 144 is surrounded by an inner surface 144 athereof.

In the 1st example, the inner surface 144 a of the central opening 144of the light blocking sheet 140 is non-circular. In FIG. 1C, the lightblocking sheet 140 includes a plurality of protruding structures (theirreference numerals are omitted) which are extended from the centralopening 144 thereof to the central axis z, thus the inner surface 144 aof the central opening 144 is a polygon. Therefore, it is favorable forreducing the unwanted residual light around the image and the straylight reflection caused by the light blocking sheet. More particularly,in the 1st example, the light blocking sheet and the protrudingstructures, which are extended from the central opening of the lightblocking sheet, can be integrally form.

In FIG. 1D, a diameter of the central opening 144 of the light blockingsheet 140 on the object-side surface 141 is smaller than a diameter ofthe central opening 144 on the image-side surface 142. When an anglebetween the inner surface 144 a of the central opening 144 and thecentral axis z is θ, θ is 40 degrees.

In the imaging lens set 100 according to the 1st example, an outerdiameter of the first lens element 110 is D1, an outer diameter of thesecond lens element 120 is D2, an outside diameter of the third lenselement 130 is D3, a diameter of the outer diameter surface 143 of thelight blocking sheet 140 is D, a maximum diameter of the second conicalsurface 124 is ψ2, a minimum diameter of the fourth conical surface 126is ψ4, a minimum inner diameter of the central opening 144 of the lightblocking sheet 140 is ψi, a width of the fourth conical surface is w4(In particular, w4 is a width of the fourth conical surface 126 parallelto the central axis z), an angle between the second conical surface 124and the central axis z is α1, and an angle between the fourth conicalsurface 126 and the central axis z α2. The data of D1, D2, D3, D, ψ2,ψ4, ψi, w4, α1, α2, (ψ4−ψ2)/2, |ψ4−D|/2, (π{circumflex over( )}2)×((ψ4−ψ2)/D), ψi/D, ψ4/D1, (π{circumflex over ( )}2)×w4/D2 and(ψ4−ψ2)/(2×w4) of the 1st example are listed in Table 1.

TABLE 1 1st example D1 (mm)  4.4 α2 (degree) 20 D2 (mm)  4.95 (ψ4 −ψ2)/2 (mm)  0.435 D3 (mm)  5.4 |ψ4 − D|/2 (mm)  0 D (mm)  4.55(π{circumflex over ( )}2) × ((ψ4 − ψ2)/D)  1.887 ψ2 (mm)  3.68 ψi/D  0.6ψ4 (mm)  4.55 ψ4/D1  1.034 ψi (mm)  2.73 (π{circumflex over ( )}2) ×w4/D2  0.217 w4 (mm)  0.11 (ψ4 − ψ2)/(2 × w4)  3.955 α1 (degree) 20

2nd Example

FIG. 2A is a schematic view of an imaging lens set 200 according to the2nd example of the present disclosure, and FIG. 2B is an exploded viewof the imaging lens set 200 in FIG. 2A. In FIG. 2A, the imaging lens set200 of the 2nd example includes three plastic lens elements and a lightblocking sheet, in which the imaging lens set 200 has a central axis z.In particular, the three plastic lens elements include a first lenselement 210, a second lens element 220 and a third lens element 230which are arranged along the central axis z of the imaging lens set 200in order from an object side to an image side. The light blocking sheet240 is disposed between the second lens element 220 and the third lenselement 230. More particularly, the light blocking sheet 240 has acentral opening 244 (its reference numeral is labeled in FIG. 2C) whichis coaxial with the first lens element 210, the second lens element 220and the third lens element 230.

In FIG. 2B, each of the first lens element 210, the second lens element220, the third lens element 230 and the light blocking sheet 240includes an object-side surface and an image-side surface disposedrelative to the object-side surface. In particular, the first lenselement 210 includes the object-side surface 211 and the image-sidesurface 212 disposed relative to the object-side surface 211. The secondlens element 220 includes the object-side surface 221 and the image-sidesurface 222. The third lens element 230 includes the object-side surface231 and the image-side surface 232. The light blocking sheet 240includes the object-side surface 241 and the image-side surface 242.

In details, the object-side surface 211 of the first lens element 210includes an effective optical section 211 a and a lens peripheralsection 211 b which are arranged from the central axis z to the edgethereof, and the image-side surface 212 of the first lens element 210includes an effective optical section 212 a and a lens peripheralsection 212 b which are arranged from the central axis z to the edgethereof. The object-side surface 221 of the second lens element 220includes an effective optical section 221 a and a lens peripheralsection 221 b which are arranged from the central axis z to the edgethereof, and the image-side surface 222 of the second lens element 220includes an effective optical section 222 a and a lens peripheralsection 222 b which are arranged from the central axis z to the edgethereof. The object-side surface 231 of the third lens element 230includes an effective optical section 231 a and a lens peripheralsection 231 b which are arranged from the central axis z to the edgethereof, and the image-side surface 232 of the third lens element 230includes an effective optical section 232 a and a lens peripheralsection 232 b which are arranged from the central axis z to the edgethereof.

In the 2nd example, the first lens element 210 includes a first flatabutting portion 213 and a first conical surface 214. The first flatabutting portion 213 and the first conical surface 214 are both disposedon the image-side surface 212 of the first lens element 210, and thefirst conical surface 214 is closer to the central axis z than the firstflat abutting portion 213. The second lens element 220 includes a secondflat abutting portion 223, a second conical surface 224, a fourth flatabutting portion 225 and a fourth conical surface 226. The second flatabutting portion 223 and the second conical surface 224 are bothdisposed on the object-side surface 221 of the second lens element 220,and the second conical surface 224 is closer to the central axis z thanthe second flat abutting portion 223 thereto. The fourth flat abuttingportion 225 and the fourth conical surface 226 are both disposed on theimage-side surface 222 of the second lens element 220, and the fourthconical surface 226 is farer away from the central axis z than thefourth flat abutting portion 225 to the central axis z. The third lenselement 230 includes a third flat abutting portion 233 and a thirdconical surface 234. The third flat abutting portion 233 and the thirdconical surface 234 are both disposed on the object-side surface 231 ofthe third lens element 230, and the third conical surface 234 is fareraway from the central axis z than the third flat abutting portion 233.

As shown in FIG. 2A, the first flat abutting portion 213 is abutted withthe second flat abutting portion 223, the first conical surface 214contacts with the second conical surface 224. Thus, the first lenselement 210 and the second lens element 220 are assembled with eachother and aligned to the central axis z of the imaging lens set 200.Similarly, the fourth conical surface 226 contacts with the thirdconical surface 234, and the object-side surface 241 of the lightblocking sheet 240 is abutted with the fourth flat abutting portion 225,and the image-side surface 242 of the light blocking sheet 240 isabutted with the third flat abutting portion 233. Thus, the second lenselement 220 and the third lens element 230 are assembled with each otherand aligned to the central axis z of the imaging lens set 200. As shownin a partial enlarged diagram of FIG. 2A, a part of the third conicalsurface 234 is not overlapped with the second lens element 220 along adirection perpendicular to and away from the central axis z. That is, anair gap is arranged between the edge of the second lens element 220 andthe edge of the third lens element 230 in a direction perpendicular tothe central axis z. Thus, the roundness of single lens element will notaffect the fit of the lens elements.

In FIG. 2B, an angle α1 between the second conical surface 224 and thecentral axis z is disposed corresponding to an angle between the firstconical surface 214 and the central axis z, that is, α3, for assemblingwith each other. Similarly, an angle α2 between the fourth conicalsurface 226 and the central axis z is disposed corresponding to anangle, that is, α4, between the third conical surface 234 and thecentral axis z for assembling with each other.

FIG. 2C is a top view of a light blocking sheet 240 of the imaging lensset 200 in FIG. 2A, and FIG. 2D is a cross-sectional view along line 2d-2 d of FIG. 2C. In FIG. 2C and FIG. 2D, the light blocking sheet 240has the central axis z. The object-side surface 241 and the image-sidesurface 242 of the light blocking sheet 240 further includes an outerdiameter surface 243 and a central opening 244. The central axis zpasses through the central opening 244. The outer diameter surface 243connects the object-side surface 241 with the image-side surface 242 ofthe light blocking sheet 240 and is coaxial with the central opening244. The central opening 244 is surrounded by an inner surface 244 athereof. In particular, the inner surface 244 a of the central opening244 of the light blocking sheet 240 is circular. More particularly, adiameter of the central opening 244 of the light blocking sheet 240 onthe object-side surface 241 is equal to a diameter of the centralopening 244 on the image-side surface 242.

In addition to the structural features as mentioned above, the imaginglens set 200 includes other optical elements disposed between each twoof the first lens element 210, the second lens element 220 and the thirdlens element 230 or between the object-side surface 211 of the firstlens element 210 and the image-side surface 232 of the third lenselement 230. The optical elements can be but not limited to lenselements, imaging compensation elements, light blocking sheets, spacersor retainers.

The data of the parameters D1, D2, D3, D, ψ2, ψ4, ψi, w4, α1, α2,(ψ4−ψ2)/2, |4−D|/2, (π{circumflex over ( )}2)×((ψ4−ψ2)/D), ψi/D, ψ4/D1,(π{circumflex over ( )}2)×w4/D2 and (ψ4−ψ2)/(2×w4) of the imaging lensset 200 according to the 2nd example of the present disclosure arelisted in the following Table 2. The definitions of these parametersshown in Table 2 are the same as those stated in the imaging lens set100 of the 1st example shown in FIG. 2B and FIG. 2D, so an explanationin this regard will not be provided again.

TABLE 2 2nd example D1 (mm)  4.3 α2 (degree) 30 D2 (mm)  4.6 (ψ4 − ψ2)/2(mm)  0.255 D3 (mm)  5.12 |ψ4 − D|/2 (mm)  0.04 D (mm)  4.08(π{circumflex over ( )}2) × ((ψ4 − ψ2)/D)  1.234 ψ2 (mm)  3.49 ψi/D 0.627 ψ4 (mm)  4 ψ4/D1  0.93 ψi (mm)  2.56 (π{circumflex over ( )}2) ×w4/D2  0.227 w4 (mm)  0.105 (ψ4 − ψ2)/(2 × w4)  2.429 α1 (degree) 10

3rd Example

FIG. 3A is a schematic view of an imaging lens set 300 according to the3rd example of the present disclosure, and FIG. 3B is an exploded viewof the imaging lens set 300 in FIG. 3A. In FIG. 3A, the imaging lens set300 of the 3rd example includes three plastic lens elements and a lightblocking sheet, in which the imaging lens set 300 has a central axis z.In particular, the three plastic lens elements include a first lenselement 310, a second lens element 320 and a third lens element 330which are arranged along the central axis z of the imaging lens set 300from an object side to an image side. The light blocking sheet 340 isdisposed between the second lens element 320 and the third lens element330. More particularly, the light blocking sheet 340 has a centralopening 344 (its reference numeral is labeled in FIG. 3C) coaxially withthe first lens element 310, the second lens element 320 and the thirdlens element 330.

In FIG. 3B, each of the first lens element 310, the second lens element320, the third lens element 330 and the light blocking sheet 340includes an object-side surface and an image-side surface disposedrelative to the object-side surface. In particular, the first lenselement 310 includes the object-side surface 311 and the image-sidesurface 312 disposed relative to the object-side surface 311. The secondlens element 320 includes the object-side surface 321 and the image-sidesurface 322. The third lens element 330 includes the object-side surface331 and the image-side surface 332. The light blocking sheet 340includes the object-side surface 341 and the image-side surface 342.

In details, the object-side surface 311 of the first lens element 310includes an effective optical section 311 a and a lens peripheralsection 311 b which are arranged from the central axis z to the edgethereof, and the image-side surface 312 of the first lens element 310includes an effective optical section 312 a and a lens peripheralsection 312 b which are arranged from the central axis z to the edgethereof. The object-side surface 321 of the second lens element 320includes an effective optical section 321 a and a lens peripheralsection 321 b which are arranged from the central axis z to the edgethereof, and the image-side surface 322 of the second lens element 320includes an effective optical section 322 a and a lens peripheralsection 322 b which are arranged from the central axis z to the edgethereof. The object-side surface 331 of the third lens element 330includes an effective optical section 331 a and a lens peripheralsection 331 b which are arranged from the central axis z to the edgethereof, and the image-side surface 332 of the third lens element 330includes an effective optical section 332 a and a lens peripheralsection 332 b which are arranged from the central axis z to the edgethereof.

In the 3rd example, the first lens element 310 includes a first flatabutting portion 313 and a first conical surface 314. The first flatabutting portion 313 and the first conical surface 314 are both disposedon the image-side surface 312 of the first lens element 310, and thefirst conical surface 314 is closer to the central axis z than the firstflat abutting portion 313 thereto. The second lens element 320 includesa second flat abutting portion 323, a second conical surface 324, afourth flat abutting portion 325 and a fourth conical surface 326. Thesecond flat abutting portion 323 and the second conical surface 324 areboth disposed on the object-side surface 321 of the second lens element320, and the second conical surface 324 is closer to the central axis zthan the second flat abutting portion 323 thereto. The fourth flatabutting portion 325 and the fourth conical surface 326 are bothdisposed on the image-side surface 322 of the second lens element 320,and the fourth conical surface 326 is farer away from the central axis zthan the fourth flat abutting portion 325 to the central axis z. Thethird lens element 330 includes a third flat abutting portion 333 and athird conical surface 334. The third flat abutting portion 333 and thethird conical surface 334 are both disposed on the object-side surface331 of the third lens element 330, and the third conical surface 334 isfarer away from the central axis z than the third flat abutting portion333 to the central axis z.

As shown in FIG. 3A, the first flat abutting portion 313 is abutted withthe second flat abutting portion 323, the first conical surface 314contacts with the second conical surface 324. Thus, the first lenselement 310 and the second lens element 320 are assembled with eachother and aligned to the central axis z of the imaging lens set 300. Thefourth conical surface 326 contacts with the third conical surface 334,and the object-side surface 341 of the light blocking sheet 340 isabutted with the fourth flat abutting portion 325, and the image-sidesurface 342 of the light blocking sheet 340 is abutted with the thirdflat abutting portion 333. Thus, the second lens element 320 and thethird lens element 330 are assembled with each other and aligned to thecentral axis z of the imaging lens set 300. As shown in a partialenlarged diagram of FIG. 3A, a part of the third conical surface 334 isnot overlapped with the second lens element 320 along a directionperpendicular to and away from the central axis z. That is, an air gapis arranged between the edge of the second lens element 320 and the edgeof the third lens element 330 in a direction perpendicular to thecentral axis z. Thus, the roundness of single lens element will notaffect the fit of the lens elements.

In FIG. 3B, an angle α1 between the second conical surface 324 and thecentral axis z is disposed corresponding to an angle between the firstconical surface 314 and the central axis z, that is, α3, for assemblingwith each other. Similarly, an angle α2 between the fourth conicalsurface 326 and the central axis z is disposed corresponding to anangle, that is, α4, between the third conical surface 334 and thecentral axis z for assembling with each other.

In FIG. 3C, which is a cross-sectional view of a light blocking sheet340 of the imaging lens set 300 in FIG. 3A. In the 3rd example, thedesign of the light blocking sheet 340 is approximately identical to thedesign of the light blocking sheet 240 provided in the 2nd example. InFIG. 3C, the light blocking sheet 340 has the central axis z. Theobject-side surface 341 and the image-side surface 342 of the lightblocking sheet 340 further includes an outer diameter surface 343 and acentral opening 344. The central axis z passes through the centralopening 344. The outer diameter surface 343 connects the object-sidesurface 341 with the image-side surface 342 of the light blocking sheet340 and is coaxial with the central opening 344. The central opening 344is surrounded by an inner surface 344 a thereof. In particular, theinner surface 344 a of the central opening 344 of the light blockingsheet 340 is circular. More particularly, a diameter of the centralopening 344 of the light blocking sheet 340 on the object-side surface341 is equal to a diameter of the central opening 344 on the image-sidesurface 342.

In addition to the structural features as mentioned above, the imaginglens set 300 includes other optical elements disposed between each twoof the first lens element 310, the second lens element 320 and the thirdlens element 330 or between the object-side surface 311 of the firstlens element 310 and the image-side surface 332 of the third lenselement 330. The optical elements can be but not limited to lenselements, imaging compensation elements, light blocking sheets, spacersor retainers.

The data of the parameters D1, D2, D3, D, ψ2, ψ4, ψi, w4, α1, α2,(ψ4−ψ2)/2, |ψ4−D|/2, (π{circumflex over ( )}2)×((ψ4−ψ2)/D), ψi/D, ψ4/D1,(π{circumflex over ( )}2)×w4/D2 and (ψ4−ψ2)/(2×w4) of the imaging lensset 300 according to the 3rd example of the present disclosure arelisted in the following Table 3. The definitions of these parametersshown in Table 3 are the same as those stated in the imaging lens set100 of the 1st example shown in FIG. 3B and FIG. 3C, so an explanationin this regard will not be provided again.

TABLE 3 3rd example D1 (mm)  4.1 α2 (degree) 10 D2 (mm)  4.72 (ψ4 −ψ2)/2 (mm)  0.535 D3 (mm)  4.9 |ψ4 − D|/2 (mm)  0.01 D (mm)  4.23(π{circumflex over ( )}2) × ((ψ4 − ψ2)/D)  2.497 ψ2 (mm)  3.18 ψi/D 0.511 ψ4 (mm)  4.25 ψ4/D1  1.037 ψi (mm)  2.16 (π{circumflex over( )}2) × w4/D2  0.23 w4 (mm)  0.11 (ψ4 − ψ2)/(2 × w4)  4.864 α1 (degree)30

4th Example

FIG. 4A is a schematic view of an imaging lens set 400 according to the4th example of the present disclosure, FIG. 4B is an exploded view ofthe imaging lens set 400 in FIG. 4A, and FIG. 4C is a cross-sectionalview of a light blocking sheet 440 of the imaging lens set 400 in FIG.4A. In FIG. 4A, the imaging lens set 400 of the 4th example includesthree plastic lens elements and a light blocking sheet, in which theimaging lens set 400 has a central axis z. In particular, the threeplastic lens elements include a first lens element 410, a second lenselement 420 and a third lens element 430 which are arranged along thecentral axis z of the imaging lens set 400 in order from an object sideto an image side. The light blocking sheet 440 is disposed between thesecond lens element 420 and the third lens element 430. Moreparticularly, the light blocking sheet 440 has a central opening 444(shown in FIG. 4C) which is coaxial with the first lens element 410, thesecond lens element 420 and the third lens element 430.

In FIG. 4B, the first lens element 410 includes the object-side surface411 and the image-side surface 412 disposed relative to the object-sidesurface 411. The second lens element 420 includes the object-sidesurface 421 and the image-side surface 422. The third lens element 430includes the object-side surface 431 and the image-side surface 432. Thelight blocking sheet 440 includes the object-side surface 441 and theimage-side surface 442.

In details, the object-side surface 411 of the first lens element 410includes an effective optical section 411 a and a lens peripheralsection 411 b which are arranged from the central axis z to the edgethereof, and the image-side surface 412 of the first lens element 410includes an effective optical section 412 a and a lens peripheralsection 412 b which are arranged from the central axis z to the edgethereof. The object-side surface 421 of the second lens element 420includes an effective optical section 421 a and a lens peripheralsection 421 b which are arranged from the central axis z to the edgethereof, and the image-side surface 422 of the second lens element 420includes an effective optical section 422 a and a lens peripheralsection 422 b which are arranged from the central axis z to the edgethereof. The object-side surface 431 of the third lens element 430includes an effective optical section 431 a and a lens peripheralsection 431 b which are arranged from the central axis z to the edgethereof, and the image-side surface 432 of the third lens element 430includes an effective optical section 432 a and a lens peripheralsection 432 b which are arranged from the central axis z to the edgethereof.

In the 4th example, the first lens element 410 includes a first flatabutting portion 413 and a first conical surface 414. The first flatabutting portion 413 and the first conical surface 414 are both disposedon the image-side surface 412 of the first lens element 410, and thefirst conical surface 414 is closer to the central axis z than the firstflat abutting portion 413 thereto. The second lens element 420 includesa second flat abutting portion 423, a second conical surface 424, afourth flat abutting portion 425 and a fourth conical surface 426. Thesecond flat abutting portion 423 and the second conical surface 424 areboth disposed on the object-side surface 421 of the second lens element420, and the second conical surface 424 is closer to the central axis zthan the second flat abutting portion 423 thereto. The fourth flatabutting portion 425 and the fourth conical surface 426 are bothdisposed on the image-side surface 422 of the second lens element 420,and the fourth conical surface 426 is farer away from the central axis zthan the fourth flat abutting portion 425 to the central axis z. Thethird lens element 430 includes a third flat abutting portion 433 and athird conical surface 434. The third flat abutting portion 433 and thethird conical surface 434 are both disposed on the object-side surface431 of the third lens element 430, and the third conical surface 434 isfarer away from the central axis z than the third flat abutting portion433 to the central axis z.

As shown in FIG. 4A, the first flat abutting portion 413 is abutted withthe second flat abutting portion 423, the first conical surface 414contacts with the second conical surface 424. Thus, the first lenselement 410 and the second lens element 420 are assembled with eachother and aligned to the central axis z of the imaging lens set 400. Thefourth conical surface 426 contacts with the third conical surface 434,and the object-side surface 441 of the light blocking sheet 440 isabutted with the fourth flat abutting portion 425, and the image-sidesurface 442 of the light blocking sheet 440 is abutted with the thirdflat abutting portion 433. Thus, the second lens element 420 and thethird lens element 430 are assembled with each other and aligned to thecentral axis z of the imaging lens set 400. As shown in a partialenlarged diagram of FIG. 4A, a part of the third conical surface 434 isnot overlapped with the second lens element 420 along a directionperpendicular to and away from the central axis z. That is, an air gapis arranged between the edge of the second lens element 420 and the edgeof the third lens element 430 in a direction perpendicular to thecentral axis z. Thus, the roundness of single lens element will notaffect the fit of the lens elements.

In FIG. 4B, an angle α1 between the second conical surface 424 and thecentral axis z is disposed corresponding to an angle between the firstconical surface 414 and the central axis z, that is, α3, for assemblingwith each other. Similarly, an angle α2 between the fourth conicalsurface 426 and the central axis z is disposed corresponding to anangle, that is, α4, between the third conical surface 434 and thecentral axis z for assembling with each other.

As shown in FIG. 4C, the light blocking sheet 440 has the central axisz. The object-side surface 441 and the image-side surface 442 of thelight blocking sheet 440 further includes an outer diameter surface 443and a central opening 444. The central axis z passes through the centralopening 444. The outer diameter surface 443 connects the object-sidesurface 441 with the image-side surface 442 of the light blocking sheet440 and is coaxially with the central opening 444. The central opening444 is surrounded by an inner surface 444 a thereof. In particular, theinner surface 444 a of the central opening 444 of the light blockingsheet 440 is circular. More particularly, a diameter of the centralopening 444 of the light blocking sheet 440 on the object-side surface441 is equal to a diameter of the central opening 444 on the image-sidesurface 442.

The data of the parameters D1, D2, D3, D, ψ2, ψ4, ψi, w4, α1, α2,(ψ4−ψ2)/2, ψ4−D|/2, (π{circumflex over ( )}2)×((ψ4−ψ2)/D), ψi/D, ψ4/D1,(π{circumflex over ( )}2)×w4/D2 and (ψ4−ψ2)/(2×w4) of the imaging lensset 400 according to the 4th example of the present disclosure arelisted in the following Table 4. The definitions of these parametersshown in Table 4 are the same as those stated in the imaging lens set100 of the 1st example shown in FIG. 4B and FIG. 4C, so an explanationin this regard will not be provided again.

TABLE 4 4th example D1 (mm)  3.7 α2 (degree) 20 D2 (mm)  4.25 (ψ4 −ψ2)/2 (mm)  0.37 D3 (mm)  4.9 |ψ4 − D|/2 (mm)  0 D (mm)  3.85(π{circumflex over ( )}2) × ((ψ4 − ψ2)/D)  1.895 ψ2 (mm)  3.11 ψi/D 0.592 ψ4 (mm)  3.85 ψ4/D1  1.041 ψi (mm)  2.28 (π{circumflex over( )}2) × w4/D2  0.278 w4 (mm)  0.12 (ψ4 − ψ2)/(2 × w4)  3.083 α1(degree) 20

5th Example

FIG. 5A is a schematic view of an imaging lens set 500 according to the5th example of the present disclosure, FIG. 5B is an exploded view ofthe imaging lens set 500 in FIG. 5A, and FIG. 5C is a cross-sectionalview of a light blocking sheet 540 of the imaging lens set 500 in FIG.5A. In FIG. 5A, the imaging lens set 500 of the 5th example includesthree plastic lens elements and a light blocking sheet, in which theimaging lens set 500 has a central axis z. In particular, the threeplastic lens elements include a first lens element 510, a second lenselement 520 and a third lens element 530 which are arranged along thecentral axis z of the imaging lens set 500 from an object side to animage side. The light blocking sheet 540 is disposed between the secondlens element 520 and the third lens element 530. More particularly, thelight blocking sheet 540 has a central opening 544 (shown in FIG. 5C)which is coaxial with the first lens element 510, the second lenselement 520 and the third lens element 530.

In FIG. 5B, the first lens element 510 includes the object-side surface511 and the image-side surface 512 disposed relative to the object-sidesurface 511. The second lens element 520 includes the object-sidesurface 521 and the image-side surface 522. The third lens element 530includes the object-side surface 531 and the image-side surface 532. Thelight blocking sheet 540 includes the object-side surface 541 and theimage-side surface 542.

In details, the object-side surface 511 of the first lens element 510includes an effective optical section 511 a and a lens peripheralsection 511 b which are arranged from the central axis z to the edgethereof, and the image-side surface 512 of the first lens element 510includes an effective optical section 512 a and a lens peripheralsection 512 b which are arranged from the central axis z to the edgethereof. The object-side surface 521 of the second lens element 520includes an effective optical section 521 a and a lens peripheralsection 521 b which are arranged from the central axis z to the edgethereof, and the image-side surface 522 of the second lens element 520includes an effective optical section 522 a and a lens peripheralsection 522 b which are arranged from the central axis z to the edgethereof. The object-side surface 531 of the third lens element 530includes an effective optical section 531 a and a lens peripheralsection 531 b which are arranged from the central axis z to the edgethereof, and the image-side surface 532 of the third lens element 530includes an effective optical section 532 a and a lens peripheralsection 532 b which are arranged from the central axis z to the edgethereof.

In the 5th example, the first lens element 510 includes a first flatabutting portion 513 and a first conical surface 514. The first flatabutting portion 513 and the first conical surface 514 are both disposedon the image-side surface 512 of the first lens element 510, and thefirst conical surface 514 is closer to the central axis z than the firstflat abutting portion 513 thereto. The second lens element 520 includesa second flat abutting portion 523, a second conical surface 524, afourth flat abutting portion 525 and a fourth conical surface 526. Thesecond flat abutting portion 523 and the second conical surface 524 areboth disposed on the object-side surface 521 of the second lens element520, and the second conical surface 524 is closer to the central axis zthan the second flat abutting portion 523 thereto. The fourth flatabutting portion 525 and the fourth conical surface 526 are bothdisposed on the image-side surface 522 of the second lens element 520,and the fourth conical surface 526 is farer away from the central axis zthan the fourth flat abutting portion 525 to the central axis z. Thethird lens element 530 includes a third flat abutting portion 533 and athird conical surface 534. The third flat abutting portion 533 and thethird conical surface 534 are both disposed on the object-side surface531 of the third lens element 530, and the third conical surface 534 isfarer away from the central axis z than the third flat abutting portion533 to the central axis z.

As shown in FIG. 5A, the first flat abutting portion 513 is abutted withthe second flat abutting portion 523, the first conical surface 514contacts with the second conical surface 524. Thus, the first lenselement 510 and the second lens element 520 are assembled with eachother and aligned to the central axis z of the imaging lens set 500. Thefourth conical surface 526 contacts with the third conical surface 534,and the object-side surface 541 of the light blocking sheet 540 isabutted with the fourth flat abutting portion 525, and the image-sidesurface 542 of the light blocking sheet 540 is abutted with the thirdflat abutting portion 533. Thus, the second lens element 520 and thethird lens element 530 are assembled with each other and aligned to thecentral axis z of the imaging lens set 500. As shown in a partialenlarged diagram of FIG. 5A, a part of the third conical surface 534 isnot overlapped with the second lens element 520 along a directionperpendicular to and away from the central axis z. That is, an air gapis arranged between the edge of the second lens element 520 and the edgeof the third lens element 530 in a direction perpendicular to thecentral axis z. Thus, the roundness of single lens element will notaffect the fit of the lens elements.

In FIG. 5B, an angle α1 between the second conical surface 524 and thecentral axis z is disposed corresponding to an angle between the firstconical surface 514 and the central axis z, that is, α3, for assemblingwith each other. Similarly, an angle α2 between the fourth conicalsurface 526 and the central axis z is disposed corresponding to anangle, that is, α4, between the third conical surface 534 and thecentral axis z for assembling with each other.

As shown in FIG. 5C, the light blocking sheet 540 has the central axisz. The object-side surface 541 and the image-side surface 542 of thelight blocking sheet 540 further includes an outer diameter surface 543and a central opening 544. The central axis z passes through the centralopening 544. The outer diameter surface 543 connects the object-sidesurface 541 with the image-side surface 542 of the light blocking sheet540 and is coaxially with the central opening 544. The central opening544 is surrounded by an inner surface 544 a thereof. In particular, theinner surface 544 a of the central opening 544 of the light blockingsheet 540 is circular. More particularly, a diameter of the centralopening 544 of the light blocking sheet 540 on the object-side surface541 is equal to a diameter of the central opening 544 on the image-sidesurface 542.

The data of the parameters D1, D2, D3, D, ψ2, ψ4, ψi, w4, α1, α2,(ψ4−ψ2)/2, |ψ4−D|/2, (π{circumflex over ( )}2)×((ψ4−ψ2)/D), ψi/D, ψ4/D1,(π{circumflex over ( )}2)×w4/D2 and (ψ4−ψ2)/(2×w4) of the imaging lensset 500 according to the 5th example of the present disclosure arelisted in the following Table 5. The definitions of these parametersshown in Table 5 are the same as those stated in the imaging lens set100 of the 1st example shown in FIG. 5B and FIG. 5C, so an explanationin this regard will not be provided again.

TABLE 5 5th example D1 (mm)  3.9 α2 (degree) 20 D2 (mm)  4.2 (ψ4 − ψ2)/2(mm)  0.26 D3 (mm)  4.9 |ψ4 − D|/2 (mm)  0 D (mm)  3.85 (π{circumflexover ( )}2) × ((ψ4 − ψ2)/D)  1.332 ψ2 (mm)  3.33 ψi/D  0.587 ψ4 (mm) 3.85 ψ4/D1  0.987 ψi (mm)  2.26 (π{circumflex over ( )}2) × w4/D2 0.259 w4 (mm)  0.11 (ψ4 − ψ2)/(2 × w4)  2.364 α1 (degree) 20

6th Example

FIG. 6 is a cross-sectional view of an imaging lens module 1000according to the 6th example of the present disclosure. In FIG. 6, theimaging lens module 1000 includes a plastic barrel 1100 and an opticallens assembly 1200 disposed in the plastic barrel 1100. The optical lensassembly 1200 of the 6th example includes the imaging lens set 100according to the 1st example of the present disclosure.

The plastic barrel 1100 includes a barrel hole 1110, and the barrel hole1110 includes a minimum inner diameter position 1110 a for suppressingthe stray light and improving the image quality of the imaging lensmodule 1000. Moreover, the minimum inner diameter position 1110 a of thebarrel hole 1110 can be an aperture stop of the imaging lens module1000. Therefore, it is favorable for simplifying the mechanical designof the imaging lens module 1000.

The imaging lens module 1000 further includes an object-side end 1300,an image-side end 1400 and an image surface 1500. The object-side end1300 faces towards an imaged object (not shown), and the image-side end1400 faces towards the image surface 1500.

The optical lens assembly 1200 is disposed in the plastic barrel 1100along an optical axis of the imaging lens module 1000, which iscoaxially with the central axis z of the imaging lens set 100, andincludes a lens element 1210, a lens element 1220, the first lenselement 110, the second lens element 120, and the third lens element 130of the 1st example and a lens element 1230 in order from the object-sideend 1300 to the image-side end 1400. The optical lens assembly 1200further includes the light blocking sheet 140 of the 1st example, andthe light blocking sheet 140 is disposed between the second lens element120 and the third lens element 130 for further suppressing the straylight and improving the image quality of the imaging lens module 1000.

The structural features of the first lens element 110, the second lenselement 120, the third lens element 130 and the light blocking sheet 140of the imaging lens set 100 according to the 1st example can be referredback to FIG. 1A. In short, the first lens element 110 includes a firstflat abutting portion 113 and a first conical surface 114. The firstflat abutting portion 113 and the first conical surface 114 are bothdisposed on the image-side surface 112 of the first lens element 110,and the first conical surface 114 is closer to the central axis z thanthe first flat abutting portion 113 thereto. The second lens element 120includes a second flat abutting portion 123, a second conical surface124, a fourth flat abutting portion 125 and a fourth conical surface126. The second flat abutting portion 123 and the second conical surface124 are both disposed on the object-side surface 121 of the second lenselement 120, and the second conical surface 124 is closer to the centralaxis z than the second flat abutting portion 123 thereto. The fourthflat abutting portion 125 and the fourth conical surface 126 are bothdisposed on the image-side surface 122 of the second lens element 120,and the fourth conical surface 126 is farer away from the central axis zthan the fourth flat abutting portion 125 to the central axis z. Thethird lens element 130 includes a third flat abutting portion 133 and athird conical surface 134. The third flat abutting portion 133 and thethird conical surface 134 are both disposed on the object-side surface131 of the third lens element 130, and the third conical surface 134 isfarer away from the central axis z than the third flat abutting portion133 to the central axis z.

The first flat abutting portion 113 is abutted with the second flatabutting portion 123, the first conical surface 114 contacts with thesecond conical surface 124, and thus the first lens element 110 isassembled with the second lens element 120. In the meanwhile, the fourthconical surface 126 contacts with the third conical surface 134, and theobject-side surface 141 of the light blocking sheet 140 is abutted withthe fourth flat abutting portion 125, and the image-side surface 142 ofthe light blocking sheet 140 is abutted with the third flat abuttingportion 133, thus, the second lens element 120 is assembled with thethird lens element 130. As shown in FIG. 6, through the structuraldesigns of the object-side surface 111 of the first lens element 110 andthe image-side surface 132 of the third lens element 130, the lenselement 1220 and the lens element 1230 are assembled with the imaginglens set 100 and aligned to the central axis z of the imaging lens set100. Other details of the imaging lens set 100 has been described in the1st example and will not be described again herein.

Moreover, the lens element 1210, the lens element 1220 and the lenselement 1230 of the optical lens assembly 1200 can be made of plastic orglass materials. When the lens element is made of the plastic material,manufacturing costs can be effectively reduced. When the lens elementsare made of glass materials, the distribution of the refractive power ofthe optical lens assembly 1200 may be more flexible to design. Moreover,the optical lens assembly 1200 can include other optical elements (theirreference numerals are omitted), such as spacers, light blocking sheetsand so on.

7th Example

FIG. 7 is a cross-sectional view of an imaging lens module 2000according to the 7th example of the present disclosure. In FIG. 7, theimaging lens module 2000 includes a plastic barrel 2100 and an opticallens assembly 2200 disposed in the plastic barrel 2100. The optical lensassembly 2200 of the 7th example includes the imaging lens set 200according to the 2nd example of the present disclosure.

The plastic barrel 2100 includes a barrel hole 2110, and the barrel hole2110 includes a minimum inner diameter position 2110 a for suppressingthe stray light and improving the image quality of the imaging lensmodule 2000. Moreover, the minimum inner diameter position 2110 a of thebarrel hole 2110 can be an aperture stop of the imaging lens module2000. Therefore, it is favorable for simplifying the mechanical designof the imaging lens module 2000.

The imaging lens module 2000 further includes an object-side end 2300,an image-side end 2400 and an image surface 2500. The object-side end2300 faces towards an imaged object (not shown), and the image-side end2400 faces towards the image surface 2500.

The optical lens assembly 2200 is disposed in the plastic barrel 2100along an optical axis of the imaging lens module 2000, which iscoaxially with the central axis z of the imaging lens set 200, andincludes a lens element 2210, a lens element 2220, the first lenselement 210, the second lens element 220, and the third lens element 230of the 2nd example and a lens element 2230 in order from the object-sideend 2300 to the image-side end 2400. The optical lens assembly 2200further includes the light blocking sheet 240 of the 2nd example, andthe light blocking sheet 240 is disposed between the second lens element220 and the third lens element 230 for further suppressing the straylight and improving the image quality of the imaging lens module 2000.

The structural features of the first lens element 210, the second lenselement 220, the third lens element 230 and the light blocking sheet 240of the imaging lens set 200 according to the 2nd example can be referredback to FIG. 2A. The first lens element 210 includes a first flatabutting portion 213 and a first conical surface 214. The first flatabutting portion 213 and the first conical surface 214 are both disposedon the image-side surface 212 of the first lens element 210, and thefirst conical surface 214 is closer to the central axis z than the firstflat abutting portion 213 thereto. The second lens element 220 includesa second flat abutting portion 223, a second conical surface 224, afourth flat abutting portion 225 and a fourth conical surface 226. Thesecond flat abutting portion 223 and the second conical surface 224 areboth disposed on the object-side surface 221 of the second lens element220, and the second conical surface 224 is closer to the central axis zthan the second flat abutting portion 223 thereto. The fourth flatabutting portion 225 and the fourth conical surface 226 are bothdisposed on the image-side surface 222 of the second lens element 220,and the fourth conical surface 226 is farer away from the central axis zthan the fourth flat abutting portion 225 to the central axis z. Thethird lens element 230 includes a third flat abutting portion 233 and athird conical surface 234. The third flat abutting portion 233 and thethird conical surface 234 are both disposed on the object-side surface231 of the third lens element 230, and the third conical surface 234 isfarer away from the central axis z than the third flat abutting portion233 to the central axis z.

The first flat abutting portion 213 is abutted with the second flatabutting portion 223, the first conical surface 214 contacts with thesecond conical surface 224, and thus the first lens element 210 isassembled with the second lens element 220. In the meanwhile, the fourthconical surface 226 contacts with the third conical surface 234, and theobject-side surface 241 of the light blocking sheet 240 is abutted withthe fourth flat abutting portion 225, and the image-side surface 242 ofthe light blocking sheet 240 is abutted with the third flat abuttingportion 233, thus, the second lens element 220 is assembled with thethird lens element 230. As shown in FIG. 7, through the structuraldesigns of the object-side surface 211 of the first lens element 210 andthe image-side surface 232 of the third lens element 230, the lenselement 2220 and the lens element 2230 are assembled with the imaginglens set 200 and aligned to the central axis z of the imaging lens set200. Other details of the imaging lens set 200 has been described in the2nd example and will not be described again herein.

8th Example

FIG. 8 is a cross-sectional view of an imaging lens module 3000according to the 8th example of the present disclosure. In FIG. 8, theimaging lens module 3000 includes a plastic barrel 3100 and an opticallens assembly 3200 disposed in the plastic barrel 3100. The optical lensassembly 3200 of the 8th example includes the imaging lens set 300according to the 3rd example of the present disclosure.

The plastic barrel 3100 includes a barrel hole 3110, and the barrel hole3110 includes a minimum inner diameter position 3110 a for suppressingthe stray light and improving the image quality of the imaging lensmodule 3000. Moreover, the minimum inner diameter position 3110 a of thebarrel hole 3110 can be an aperture stop of the imaging lens module3000. Therefore, it is favorable for simplifying the mechanical designof the imaging lens module 3000.

The imaging lens module 3000 further includes an object-side end 3300,an image-side end 3400 and an image surface 3500. The object-side end3300 faces towards an imaged object (not shown), and the image-side end3400 faces towards the image surface 3500. The optical lens assembly3200 is disposed in the plastic barrel 3100 along an optical axis of theimaging lens module 3000, which is coaxially with the central axis z ofthe imaging lens set 300, and includes a lens element 3210, the firstlens element 310, the second lens element 320, and the third lenselement 330 of the 3rd example, a lens element 3220 and a lens element3230 in order from the object-side end 3300 to the image-side end 3400.The optical lens assembly 3200 further includes the light blocking sheet340 of the 3rd example, and the light blocking sheet 340 is disposedbetween the second lens element 320 and the third lens element 330 forfurther suppressing the stray light and improving the image quality ofthe imaging lens module 3000.

The structural features of the first lens element 310, the second lenselement 320, the third lens element 330 and the light blocking sheet 340of the imaging lens set 300 according to the 3rd example can be referredback to FIG. 3A. The first lens element 310 includes a first flatabutting portion 313 and a first conical surface 314. The first flatabutting portion 313 and the first conical surface 314 are both disposedon the image-side surface 312 of the first lens element 310, and thefirst conical surface 314 is closer to the central axis z than the firstflat abutting portion 313 thereto. The second lens element 320 includesa second flat abutting portion 323, a second conical surface 324, afourth flat abutting portion 325 and a fourth conical surface 326. Thesecond flat abutting portion 323 and the second conical surface 324 areboth disposed on the object-side surface 321 of the second lens element320, and the second conical surface 324 is closer to the central axis zthan the second flat abutting portion 323 thereto. The fourth flatabutting portion 325 and the fourth conical surface 326 are bothdisposed on the image-side surface 322 of the second lens element 320,and the fourth conical surface 326 is farer away from the central axis zthan the fourth flat abutting portion 325 to the central axis z. Thethird lens element 330 includes a third flat abutting portion 333 and athird conical surface 334. The third flat abutting portion 333 and thethird conical surface 334 are both disposed on the object-side surface331 of the third lens element 330, and the third conical surface 334 isfarer away from the central axis z than the third flat abutting portion333 to the central axis z.

The first flat abutting portion 313 is abutted with the second flatabutting portion 323, the first conical surface 314 contacts with thesecond conical surface 324, and thus the first lens element 310 isassembled with the second lens element 320. In the meanwhile, the fourthconical surface 326 contacts with the third conical surface 334, and theobject-side surface 341 of the light blocking sheet 340 is abutted withthe fourth flat abutting portion 325, and the image-side surface 342 ofthe light blocking sheet 340 is abutted with the third flat abuttingportion 333, thus, the second lens element 320 is assembled with thethird lens element 330. As shown in FIG. 8, through the structuraldesigns of the object-side surface 311 of the first lens element 310 andthe image-side surface 332 of the third lens element 330, the lenselement 3210 and the lens element 3220 are assembled with the imaginglens set 300 and aligned to the central axis z of the imaging lens set300. Other details of the imaging lens set 300 has been described in the3rd example and will not be described again herein.

9th Example

FIG. 9 is a cross-sectional view of an imaging lens module 4000according to the 9th example of the present disclosure. In FIG. 9, theimaging lens module 4000 includes a plastic barrel 4100 and an opticallens assembly 4200 disposed in the plastic barrel 4100. The optical lensassembly 4200 of the 9th example includes the imaging lens set 400according to the 4th example of the present disclosure.

The plastic barrel 4100 includes a barrel hole 4110, and the barrel hole4110 includes a minimum inner diameter position 4110 a for suppressingthe stray light and improving the image quality of the imaging lensmodule 4000. Moreover, the minimum inner diameter position 4110 a of thebarrel hole 4110 can be an aperture stop of the imaging lens module4000. Therefore, it is favorable for simplifying the mechanical designof the imaging lens module 4000.

The imaging lens module 4000 further includes an object-side end 4300,an image-side end 4400 and an image surface 4500. The object-side end4300 faces towards an imaged object (not shown), and the image-side end4400 faces towards the image surface 4500. In particular, the imaginglens module 4000 further includes a glass panel 4600 disposed betweenthe image-side end 4400 and the image surface 4500. More particularly,the glass panel 4600 can be a cover glass, a filter or both above, andwill not affect the focal length of the optical lens assembly 4200.

The optical lens assembly 4200 is disposed in the plastic barrel 4100along an optical axis of the imaging lens module 4000, which iscoaxially with the central axis z of the imaging lens set 400, andincludes a lens element 4210, the first lens element 410, the secondlens element 420, and the third lens element 430 of the 4th example anda lens element 4220 in order from the object-side end 4300 to theimage-side end 4400. The optical lens assembly 4200 further includes thelight blocking sheet 440 of the 4th example, and the light blockingsheet 440 is disposed between the second lens element 420 and the thirdlens element 430 for further suppressing the stray light and improvingthe image quality of the imaging lens module 4000.

The structural features of the first lens element 410, the second lenselement 420, the third lens element 430 and the light blocking sheet 440of the imaging lens set 400 according to the 4th example can be referredback to FIG. 4A. The first lens element 410 includes a first flatabutting portion 413 and a first conical surface 414. The first flatabutting portion 413 and the first conical surface 414 are both disposedon the image-side surface 412 of the first lens element 410, and thefirst conical surface 414 is closer to the central axis z than the firstflat abutting portion 413 thereto. The second lens element 420 includesa second flat abutting portion 423, a second conical surface 424, afourth flat abutting portion 425 and a fourth conical surface 426. Thesecond flat abutting portion 423 and the second conical surface 424 areboth disposed on the object-side surface 421 of the second lens element420, and the second conical surface 424 is closer to the central axis zthan the second flat abutting portion 423 thereto. The fourth flatabutting portion 425 and the fourth conical surface 426 are bothdisposed on the image-side surface 422 of the second lens element 420,and the fourth conical surface 426 is farer away from the central axis zthan the fourth flat abutting portion 425 to the central axis z. Thethird lens element 430 includes a third flat abutting portion 433 and athird conical surface 434. The third flat abutting portion 433 and thethird conical surface 434 are both disposed on the object-side surface431 of the third lens element 430, and the third conical surface 434 isfarer away from the central axis z than the third flat abutting portion433 to the central axis z.

The first flat abutting portion 413 is abutted with the second flatabutting portion 423, the first conical surface 414 contacts with thesecond conical surface 424, and thus the first lens element 410 isassembled with the second lens element 420. In the meanwhile, the fourthconical surface 426 contacts with the third conical surface 434, and theobject-side surface 441 of the light blocking sheet 440 is abutted withthe fourth flat abutting portion 425, and the image-side surface 442 ofthe light blocking sheet 440 is abutted with the third flat abuttingportion 433, thus, the second lens element 420 is assembled with thethird lens element 430. As shown in FIG. 9, through the structuraldesigns of the object-side surface 411 of the first lens element 410 andthe image-side surface 432 of the third lens element 430, the lenselement 4210 and the lens element 4220 are assembled with the imaginglens set 400 and aligned to the central axis z of the imaging lens set400. Other details of the imaging lens set 400 has been described in the4th example and will not be described again herein.

10th Example

FIG. 10 is a cross-sectional view of an imaging lens module 5000according to the 10th example of the present disclosure. In FIG. 10, theimaging lens module 5000 includes a plastic barrel 5100 and an opticallens assembly 5200 disposed in the plastic barrel 5100. The optical lensassembly 5200 of the 10th example includes the imaging lens set 500according to the 5th example of the present disclosure.

The plastic barrel 5100 includes a barrel hole 5110, and the barrel hole5110 includes a minimum inner diameter position 5110 a for suppressingthe stray light and improving the image quality of the imaging lensmodule 5000. Moreover, the minimum inner diameter position 5110 a of thebarrel hole 5110 can be an aperture stop of the imaging lens module5000. Therefore, it is favorable for simplifying the mechanical designof the imaging lens module 5000.

The imaging lens module 5000 further includes an object-side end 5300,an image-side end 5400 and an image surface 5500. The object-side end5300 faces towards an imaged object (not shown), and the image-side end5400 faces towards the image surface 5500. In particular, the imaginglens module 5000 further includes a glass panel 5600 disposed betweenthe image-side end 5400 and the image surface 5500. More particularly,the glass panel 5600 can be a cover glass, a filter or both above, andwill not affect the focal length of the optical lens assembly 5200.

The optical lens assembly 5200 is disposed in the plastic barrel 5100along an optical axis of the imaging lens module 5000, which iscoaxially with the central axis z of the imaging lens set 500, andincludes a lens element 5210, the first lens element 510, the secondlens element 520, and the third lens element 530 of the 5th example anda lens element 5220 in order from the object-side end 5300 to theimage-side end 5400. The optical lens assembly 5200 further includes thelight blocking sheet 540 of the 5th example, and the light blockingsheet 540 is disposed between the second lens element 520 and the thirdlens element 530 for further suppressing the stray light and improvingthe image quality of the imaging lens module 5000.

The structural features of the first lens element 510, the second lenselement 520, the third lens element 530 and the light blocking sheet 540of the imaging lens set 500 according to the 5th example can be referredback to FIG. 5A. The first lens element 510 includes a first flatabutting portion 513 and a first conical surface 514. The first flatabutting portion 513 and the first conical surface 514 are both disposedon the image-side surface 512 of the first lens element 510, and thefirst conical surface 514 is closer to the central axis z than the firstflat abutting portion 513 thereto. The second lens element 520 includesa second flat abutting portion 523, a second conical surface 524, afourth flat abutting portion 525 and a fourth conical surface 526. Thesecond flat abutting portion 523 and the second conical surface 524 areboth disposed on the object-side surface 521 of the second lens element520, and the second conical surface 524 is closer to the central axis zthan the second flat abutting portion 523 thereto. The fourth flatabutting portion 525 and the fourth conical surface 526 are bothdisposed on the image-side surface 522 of the second lens element 520,and the fourth conical surface 526 is farer away from the central axis zthan the fourth flat abutting portion 525 to the central axis z. Thethird lens element 530 includes a third flat abutting portion 533 and athird conical surface 534. The third flat abutting portion 533 and thethird conical surface 534 are both disposed on the object-side surface531 of the third lens element 530, and the third conical surface 534 isfarer away from the central axis z than the third flat abutting portion533 to the central axis z.

The first flat abutting portion 513 is abutted with the second flatabutting portion 523, the first conical surface 514 contacts with thesecond conical surface 524, and thus the first lens element 510 isassembled with the second lens element 520. In the meanwhile, the fourthconical surface 526 contacts with the third conical surface 534, and theobject-side surface 541 of the light blocking sheet 540 is abutted withthe fourth flat abutting portion 525, and the image-side surface 542 ofthe light blocking sheet 540 is abutted with the third flat abuttingportion 533, thus, the second lens element 520 is assembled with thethird lens element 530. As shown in FIG. 10, through the structuraldesigns of the object-side surface 511 of the first lens element 510 andthe image-side surface 532 of the third lens element 530, the lenselement 5210 and the lens element 5220 are assembled with the imaginglens set 500 and aligned to the central axis z of the imaging lens set500. Other details of the imaging lens set 500 has been described in the5th example and will not be described again herein.

11th Example

Please refer to FIG. 11A and FIG. 11B. FIG. 11A is a schematic view ofan electronic device 10 according to the 11th example of the presentdisclosure, FIG. 11B is another schematic view of the electronic device10 of the 11th example, and particularly, FIG. 11A and FIG. 11B areschematic views related to a camera of the electronic device 10. In FIG.11A and FIG. 11B, the electronic device 10 of the 11th example is asmart phone, wherein the electronic device 10 includes a camera module11. The camera module 11 includes an imaging lens module 12 according tothe present disclosure and an image sensor 13, in which the image sensor13 is disposed on an image surface (not shown) of the imaging lensmodule 12. Therefore, a better image quality can be achieved, and hencethe high-end imaging requirements of modern electronic devices can besatisfied.

Furthermore, the user activates the capturing mode via a user interface19 of the electronic device 10, in which the user interface 19 of the11th example can be a touch screen 19 a, a button 19 b and etc. At thismoment, the imaging light is converged on the image sensor 13 of theimaging lens module 12, and the electronic signal associated with imageis output to an image signal processor (ISP) 18.

FIG. 11C is a block diagram of the electronic device 10 of the 11thexample, and in particular, the block diagram is related to the cameraof the electronic device 10. In FIG. 11A to FIG. 11C, the camera module11 can further include an autofocus assembly 14 and an opticalanti-shake mechanism 15 based on the camera specification of theelectronic device 10. Moreover, the electronic device 10 can furtherinclude at least one auxiliary optical component 17 and at least onesensing component 16. The auxiliary optical component 17 can be a flashmodule for compensating for the color temperature, an infrared distancemeasurement component, a laser focus module and etc. The sensingcomponent 16 can have functions for sensing physical momentum andkinetic energy, and thereby can be an accelerator, a gyroscope, and ahall effect element, to sense shaking or jitters applied by hands of theuser or external environments. Accordingly, the functions of theautofocus assembly 14 and the optical anti-shake mechanism 15 of thecamera module 11 can be aided and enhanced to achieve the superior imagequality. Furthermore, the electronic device 10 according to the presentdisclosure can have a capturing function with multiple modes, such astaking optimized selfies, high dynamic range (HDR) under a low lightcondition, 4K resolution recording, etc. Additionally, the user canvisually see the captured image of the camera through the touch screen19 a and manually operate the view finding range on the touch screen 19a to achieve the auto focus function of what you see is what you get.

Furthermore, in FIG. 11B, the camera module 11, the sensing component 16and the auxiliary optical component 17 can be disposed on a flexibleprinted circuit board (FPC) 77 and electrically connected with theassociated components, such as the imaging signal processor 18, via aconnector 78 to perform a capturing process. Since the currentelectronic devices, such as smart phones, have a tendency of beingcompact, the way of firstly disposing the camera module and relatedcomponents on the flexible printed circuit board and secondlyintegrating the circuit thereof into the main board of the electronicdevice via the connector can satisfy the requirements of the mechanicaldesign and the circuit layout of the limited space inside the electronicdevice, and obtain more margins. The autofocus function of the cameramodule can also be controlled more flexibly via the touch screen of theelectronic device. In the 11th example, the electronic device 10includes a plurality of sensing components 16 and a plurality ofauxiliary optical components 17. The sensing components 16 and theauxiliary optical components 17 are disposed on the flexible printedcircuit board 77 and at least one other flexible printed circuit board(its reference numeral is omitted) and electrically connected with theassociated components, such as the image signal processor 18, viacorresponding connectors to perform the capturing process. In otherembodiments (not shown herein), the sensing components and the auxiliaryoptical components can also be disposed on the main board of theelectronic device or carrier boards of other types according torequirements of the mechanical design and the circuit layout.

In addition, the electronic device 10 can further include but not belimited to a wireless communication unit, a control unit, a storageunit, a random access memory, a read-only memory (ROM), or a combinationthereof.

12th Example

FIG. 12 is a schematic view of an electronic device 20 according to the12th example of the present disclosure. In FIG. 12, the electronicdevice 20 of the 12th embodiment is a tablet personal computer. Theelectronic device 20 includes an imaging lens module 22 according to anyof the examples of the present disclosure and an image sensor (not shownin the figure). The image sensor is disposed on an image surface (notshown in the figure) of the imaging lens module 22.

13th Example

FIG. 13 is a schematic view of an electronic device 30 according to the13th example of the present disclosure. In FIG. 13, the electronicdevice 30 of the 13th embodiment is a wearable device. The electronicdevice 30 includes an imaging lens module 32 according to any of theexamples of the present disclosure and an image sensor (not shown in thefigure). The image sensor is disposed on an image surface (not shown inthe figure) of the imaging lens module 32.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentinvention without departing from the scope or spirit of the invention.In view of the foregoing, it is intended that the present inventioncover modifications and variations of this invention provided they fallwithin the scope of the following claims.

What is claimed is:
 1. An imaging lens set comprising at least threeplastic lens elements and at least one light blocking sheet, and each ofthe plastic lens elements and the light blocking sheet comprising: anobject-side surface; and an image-side surface disposed relative to theobject-side surface; wherein the at least three plastic lens elementsare arranged along a central axis of the imaging lens set, whichcomprises, in order from an object side to an image side: a first lenselement comprising: a first flat abutting portion disposed on theimage-side surface of the first lens element; and a first conicalsurface disposed on the image-side surface of the first lens element; asecond lens element comprising: a second flat abutting portion disposedon the object-side surface of the second lens element; a second conicalsurface disposed on the object-side surface of the second lens element;and a fourth flat abutting portion disposed on the image-side surface ofthe second lens element; a fourth conical surface disposed on theimage-side surface of the second lens element, wherein the fourthconical surface is farer away from the central axis than the fourth flatabutting portion to the central axis; a third lens element comprising: athird flat abutting portion disposed on the object-side surface of thethird lens element; and a third conical surface disposed on theobject-side surface of the third lens element, wherein the third conicalsurface is farer away from the central axis than the third flat abuttingportion to the central axis, and a part of the third conical surface isnot overlapped with the second lens element along a directionperpendicular to and away from the central axis; wherein the first flatabutting portion is abutted with the second flat abutting portion, thefirst conical surface contacts with the second conical surface, and thethird conical surface contacts with the fourth conical surface; whereinthe light blocking sheet has a central opening and is coaxially arrangedwith the plastic lens elements, the light blocking sheet is disposedbetween the second lens element and the third lens element and furthercomprises: an outer diameter surface connecting the object-side surfaceand the image-side surface of the light blocking sheet and coaxial withthe central opening, wherein the object-side surface of the lightblocking sheet is abutted with the fourth flat abutting portion, and theimage-side surface of the light blocking sheet is abutted with the thirdflat abutting portion; wherein a minimum diameter of the fourth conicalsurface is ψ4, a maximum diameter of the second conical surface is ψ2,and the following condition is satisfied:0.13 mm<(ψ4−ψ2)/2<1.20 mm.
 2. The imaging lens set of claim 1, whereinthe first conical surface and the second conical surface are assembledwith each other for aligning to the central axis, and the fourth conicalsurface and the third conical surface are assembled with each other foraligning to the central axis.
 3. The imaging lens set of claim 2,wherein a diameter of the outer diameter surface of the light blockingsheet is D, the minimum diameter of the fourth conical surface is ψ4,and the following condition is satisfied:|ψ4−D|/2≤0.05 mm.
 4. The imaging lens set of claim 2, wherein theminimum diameter of the fourth conical surface is ψ4, the maximumdiameter of the second conical surface is ψ2, and the followingcondition is satisfied:0.18 mm<(ψ4−ψ2)/2<0.85 mm.
 5. The imaging lens set of claim 2, wherein adiameter of the outer diameter surface of the light blocking sheet is D,the minimum diameter of the fourth conical surface is ψ4, the maximumdiameter of the second conical surface is ψ2, and the followingcondition is satisfied:0.6<(π{circumflex over ( )}2)×((ψ4−ψ2)/D)<3.6.
 6. The imaging lens setof claim 5, wherein the diameter of the outer diameter surface of thelight blocking sheet is D, the minimum diameter of the fourth conicalsurface is ψ4, the maximum diameter of the second conical surface is ψ2,and the following condition is satisfied:0.82<(π{circumflex over ( )}2)×((ψ4−ψ2)/D)<2.9.
 7. The imaging lens setof claim 2, wherein an angle between the second conical surface and thecentral axis is α1 and corresponding to an angle between the firstconical surface and the central axis, an angle between the fourthconical surface and the central axis is α2 and corresponding to an anglebetween the third conical surface and the central axis, and thefollowing conditions are satisfied:3 degrees<α1<42 degrees; and3 degrees<α2<42 degrees.
 8. The imaging lens set of claim 2, wherein aminimum inner diameter of the central opening of the light blockingsheet is ψi, a diameter of the outer diameter surface of the lightblocking sheet is D, and the following condition is satisfied:0.4<ψi/D<0.76.
 9. The imaging lens set of claim 1, wherein an outerdiameter of the first lens element is D1, an outer diameter of thesecond lens element is D2, the minimum diameter of the fourth conicalsurface is ψ4, and the following condition is satisfied:D1≤ψ4<D2.
 10. The imaging lens set of claim 1, wherein the second lenselement contacts with the third lens element only via the fourth conicalsurface and the third conical surface.
 11. The imaging lens set of claim1, wherein an outer diameter of the first lens element is D1, theminimum diameter of the fourth conical surface is ψ4, and the followingcondition is satisfied:0.9<ψ4/D1<1.35.
 12. The imaging lens set of claim 11, wherein the outerdiameter of the first lens element is D1, the minimum diameter of thefourth conical surface is ψ4, and the following condition is satisfied:0.94<ψ4/D1<1.15.
 13. The imaging lens set of claim 1, wherein an anglebetween the fourth conical surface and the central axis is α2 andcorresponding to an angle between the third conical surface and thecentral axis, and the following condition is satisfied:13 degrees<α2<33 degrees.
 14. The imaging lens set of claim 1, whereinan outer diameter of the second lens element is D2, a width of thefourth conical surface is w4, and the following condition is satisfied:0.1<(π{circumflex over ( )}2)×w4/D2<0.45.
 15. The imaging lens set ofclaim 1, wherein a width of the fourth conical surface is w4, theminimum diameter of the fourth conical surface is ψ4, the maximumdiameter of the second conical surface is ψ2, and the followingcondition is satisfied:2.2<(ψ4−ψ2)/(2×w4)<6.2.
 16. The imaging lens set of claim 1, wherein awidth of the fourth conical surface is w4, the minimum diameter of thefourth conical surface is ψ4, the maximum diameter of the second conicalsurface is ψ2, and the following condition is satisfied:2.8<(ψ4−ψ2)/(2×w4)<5.4.
 17. An imaging lens module, comprising: aplastic barrel having a minimum central opening; and the imaging lensset of claim 1, wherein the imaging lens set is disposed in the plasticbarrel.
 18. An electronic device, comprising: the imaging lens module ofclaim 17; and an image sensor, wherein the image sensor is disposed onan image surface of the imaging lens module.